Warp stop-motion for looms.



No. 649,449. Patented May 8, |900.

W. E. AL'LEN.

WARP STOP HOTIUN FOR LOOM'S.

(Application filed Jan. 10, 1900.)

-y i? QJ iQ) nir-rien raras WILLIAM n. ALLEN, ot' sALnM, iviAssAonUsEr COMPANY, or PORTLAND, MArNE,

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Ans ernannt-ion ,von Leonie.

SPECIFICATION forming part of Letters Patent No. 649,419, dated May .8, 1900.

Application i'iled January 10, 19

oo. smartest. Nomina To all whom it may concern,.-

Be it known that I, VILLI'AM E. ALLEN, of Salem, county of Essex, and State of Massachusetts, have invented an Improvement in Warp-Stopldotion Mechanism for Looms, of

which the following description, in connection with the accompanying drawings, is a specification, like letters and figures on the drawings-representing like parts. A This inyention. relates to that type of warpstop-motion mechanism wherein the failure or undue slackness of a warp-thread is made eective through suitable mechanism to stop the operation of the apparatus in which the I5 stop mechanism is included-such, for instance, as a loom-`-the normal warp-th readsthats to say, such as are in proper condition-A normally maintaining a series of movable deteetors innoperative position, release of adezo tector acting to setin motion suitablestopping means. In one form of mechanism of the be-V fore-described type the vibrator engages and is arrested by a released detector, and in such construction the detector thus engaged is subjected to more or less strain. In my present invention have devised novel means for arresting the vibrator upon the movement of a released detector into operative position, but without in any' manner subjecting the detector to any strain whatsoever due to or-inci dent upon stoppage of the apparatus.

Figure lis a cross-sectional view on the line w Fig. 2,'of a portion of a loom with" enea` embodiment of my present invention applied thereto. Fig. 2 is a rear elevation of a portion of th'e loom to show the warp-stop-n1otion mechanism.. Fig. Sis a sectional detail showng'the operation of the device upon release of a detector, and Fig. 4 is a perspective de- 4o tail to be referred to.

While I have herein shown my invention as applied to a loom as being probably the most extended for its use, the invention is not restricted to such application, nor is it restricted to the precise construction and arrangement herein shown and described, one practical embodiment thereof being illustrated without attempting to show and describe various embodiments or changes which 5o may7 be made therein without departing from the spirit and scope of my invention.

The loom-frame A, th harnesses H, lease-,rods e on the rock-shaft eX, may be and are all of usual or construction. l

I n accordance with the'presentembodiment of my invention stands AX, only one of which is shown in the drawings, are secured to the loom sides and support l shaped brackets B, 6o connected by a cross-bar b, and above the cross-bar by two rods 3 4, which form warprests, as shown clearly in Fig. l, and the bar b, whichY is flattened and set on edge, is extended through longitudinal slots d of a series of detectors d, preferably made of thin flat sheet. metal, and provided each with a warp-eye dx, the upper ends of the detectors being shown as extended upwardly between the warp-rests and heldin the position shown in Fig. l by the warp=threads w, passed through the warp-eyes. The slots d are of greater length than the depth of the bar ZJ, so that a detector when released will descend from the position shownin Figs. 1 and 2 and to be 75 hereinafter' described.

Below the detectors l have shown a series of tilting deten ts E, (shown separately in Fig.

4,) preferably made of light sheet metal and provided with a longitudinal hole c5, through 8o which is extended a fulcrum-rod e, iixedly supported at its ends in the standards AX. The detents are oppositely bent or offset, as herein shown, at opposite sides of the longitudinal centenas at e8 e, the part e being 85 slightly heavier than the part e8, so that norv mally the detents will be in the position shown in Fig.-1, the parts e9 resting on a stop, shown as a rod e2, extended between the standards AX. The lighter portions es of the detents 9o extend beneath the series of detectors, the Weight of one of the latter when resting upon the detent below it being sufficient to tilt the latter'into the position in Fig. 3 for the detent E. Then the released detector, as d2, 95 Fig. 3, moves into operative position as a re suit of the failure et' its warp-thread w orby undue slackness of the latter and operates to l tilt the detent, the part e of the detent is moved into the path of a normally-moving"roo vibrator, to be described, the engagement of the vibrator with a detent device operating e shipper-lever S, the L, the knock-off arm and the cam-shaft C well-known 55 through suitable means to release the shipper one of the detent devices or sections, any de- S and stop the apparatus. A- second stop-rod tector of a group coperating with the correextended beneath the portions es of the spending detent-section. A

several detents, serves to limit the tilting v Having described my invention, what I 5' movement due to engagement with a released' claim as new, and desire to secure by Letters 5o detector, as shown in Fig. 3. Patent, is-.' Thevibratormaybeconstructedin any suitf 1. In warp-stop-motion mechanism, groups able or convenient manner, and Ihave herein of detectors maintained inoperative by noishown the same as comprising a rock-shaft .mal warp-threads, a normally-moving vibraro fx, mounted in bearings aX on the standards tor, a plurality of'deviees normally out of the 55 AX and havingaseries of upturnedbent arms path of the vibrator and each movable bya or fingers f, preferably one for each detent, released` detector of a corresponding group, the -normal swing of the. arms or fingers f to present one `of its edges to engage and stop .elearingtheportionseofthedetents,asshown the vibrator, and stopping means actuated x5 in Fig. 1. An arm f', fast on the rock-shaft, by orv through such stoppage of the vibrator. 6o

is pivotal] y connected to abent arm af, raised 2. In warp-stop-motion mechanism, groups by cam mechanism-'so that thevibrator willv of detectors maintained inoperative by norbe moved away. from the detenta' positively, mal warp-threads, a normally-moving vibrabut by gravity toward the latter.' tor, a plurality of indeiendent, pivotaliyio The mechanismbetween .thevibrator and, mounted plates each tilted by a released de- 65 l -theshipper S may be fsubstantially'such as tector ola corresponding-group to brin one shown-in United States Patent No. 622,182, edgeof .the plate into the path `of an I endated March' 29,1899, the feeler-eam Dbeing gage the vibrator, .to stop the latter, and stopmounted on the'cam-'shaft C." i ping means actuated by or through .arrest of z5 Therock-shaft e A has its 4artnr;'connected Athe -vibratorwhen engaged ley-one of said 7c by a rod eA and link d? withthe cam-actuated plates. l I meohanism,the latter beingindicated, gener- 3l In warp-stop-motion mechanism, aseries CQ'I; herein bytheletter M. J v of'independently-movable detectors mainen the movement of the vibrator is artained inoperative by normal warp-threads, 3c rested by engagementwithoneof thedetents, a normallyfnoving vibrator, a plurality of 7 5 the'rock-'shaft-e'is'tu-rned t0 release the shi tilting detente, any one of which will be moved per by or through the 'knoekm'arrn e'pas'iiij `te bring one of its edges into operative posithe geteilt hereinbef'o're referredto. f-

tion in the path of the vibrator by engage# T e tilting detent device manifestly. takes, ment with 'a released detector, to thereby en- 355 up .allot the strain orsh'ock incidentilineaire` 'gage and' arrestthe'vibrator, stops to limit 8 greet ofthe vibrator andthe parts conn ted.,l 'the' tiltin l movement of said detente, and therewith,`the detejetor being absolutel lie'e 4'stopping means actuatedfbysuch arrest of ;40 vice isv dividedwll be determined principally name Ato'this- 'specificatieniin thepresence of 85 by the weight of'a section'vrhichcaub'e tilted" two subscribing witnesses. y into operative-posi'en byimpaetofareleasedu. f 'Ff-WILLIAM- EVALLEN.

` detector. ,I if? Witnessesi `4 j .Fh seriesoffdetectors-Will-practically JOHN'G; Entr-Arms,

l v45 Vdivided intofgrou'ps corresponding-each with -`,AUGUSTnyE.Dj 

